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MT8880CE1 数据手册 - Microsemi（美高森美）
制造商:
Microsemi（美高森美）
分类:
接口芯片
封装:
PDIP-20
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MT8880CE1数据手册
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1
Zarlink Semiconductor Inc.
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 2001-2005, Zarlink Semiconductor Inc. All Rights Reserved.
Features
• Complete DTMF transmitter/receiver
• Central office quality
• Low power consumption
• Microprocessor port
• Adjustable guard time
• Automatic tone burst mode
• Call progress mode
Applications
• Credit card systems
• Paging systems
• Repeater systems/mobile radio
• Interconnect dialers
• Personal computers
Description
The MT8880C is a monolithic DTMF transceiver with
call progress filter. It is fabricated in Zarlink
Semiconductor’s ISO
2
-CMOS technology, which
provides low power dissipation and high reliability. The
DTMF receiver is based upon the industry standard
MT8870 monolithic DTMF receiver; the transmitter
utilizes a switched capacitor D/A converter for low
distortion, high accuracy DTMF signalling. Internal
counters provide a burst mode such that tone bursts
can be transmitted with precise timing. A call progress
filter can be selected allowing a microprocessor to
analyze call progress tones. A standard
microprocessor bus is provided and is directly
compatible with 6800 series microprocessors.
September 2005
Ordering Information
MT8880CE 20 Pin PDIP Tubes
MT8880CS 20 Pin SOIC Tubes
MT8880CN 24 Pin SSOP Tubes
MT8880CP 28 Pin PLCC Tubes
MT8880CP1 28 Pin PLCC* Tubes
MT8880CS1 20 Pin SOIC* Tubes
MT8880CE1 20 Pin PDIP* Tubes
MT8880CN1 24 Pin SSOP* Tubes
MT8880CSR 20 Pin SOIC Tape & Reel
MT8880CPR 28 Pin PLCC Tape & Reel
MT8880CPR1 28 Pin PLCC* Tape & Reel
MT8880CSR1 20 Pin SOIC* Tape & Reel
*Pb Free Matte Tin
-40°C to +85°C
ISO
2
- CMOS MT8880C
Integrated DTMF Transceiver
Data Sheet
Figure 1 - Functional Block Diagram
TONE
IN+
IN-
GS
OSC1
OSC2
V
DD
V
Ref
V
SS
ESt St/GT
D0
D1
D2
D3
IRQ
/CP
Φ2
CS
R/W
RS0
∑
D/A
Converters
Row and
Column
Counters
Transmit Data
Register
Data
Bus
Buffer
Tone Burst
Gating Cct.
+
-
Oscillator
Circuit
Bias
Circuit
Control
Logic
Digital
Algorithm
and Code
Converter
Control
Logic
Steering
Logic
Status
Register
Control
Register
A
Control
Register
B
Receive Data
Register
Interrupt
Logic
I/O
Control
Low Group
Filter
High Group
Filter
Dial
Tone
Filter
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